| (19) |
 |
|
(11) |
EP 0 376 164 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
22.11.1990 Bulletin 1990/47 |
| (43) |
Date of publication A2: |
|
04.07.1990 Bulletin 1990/27 |
| (22) |
Date of filing: 21.12.1989 |
|
|
| (84) |
Designated Contracting States: |
|
DE GB IT |
| (30) |
Priority: |
27.12.1988 US 289829
|
| (71) |
Applicant: THOMSON SAGINAW BALL SCREW COMPANY, INC. |
|
Saginaw
Michigan (US) |
|
| (72) |
Inventors: |
|
- Benton, Robert L.
Bay City
Michigan 48706 (US)
- Martinsons, Dainis O.
Saginaw
Michigan 48603 (US)
|
| (74) |
Representative: Tetzner, Volkmar, Dr.-Ing. Dr. jur. |
|
Van-Gogh-Strasse 3
81479 München
81479 München (DE) |
|
| |
|
| (54) |
Seal and scraper assembly for ball bearing screws and the like |
(57) A seal and scraper assembly for a ball screw (10) and nut (11) actuator has a resilient
seal ring (22) for reception by the nut which includes a radially internal helical
thread (14) mating with the screw groove (12). The seal ring further has a radially
compressible annular lip (28) extending at an angle in an axially outboard direction
from the outer periphery (22b) of the ring to engage and be radially compressed by
the nut (11). A rigid, annular mount ring (23) also has an internal thread received
by the screw groove which has an axially inboard portion (23e) interfitting with the
seal ring so as to permit relative axial movement of the seal ring (22) and mount
ring (23), while preventing relative rotation of the rings.